ENGIE Gas & LNG LLC v. Department of Public Utilities , 475 Mass. 191 ( 2016 )


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    SJC-12051
    SJC-12052
    ENGIE GAS & LNG LLC 1 vs. DEPARTMENT OF PUBLIC UTILITIES
    (and another case 2).
    Suffolk.    May 5, 2016. - August 17, 2016.
    Present:    Gants, C.J., Spina, Cordy, Botsford, Duffly, Lenk,
    & Hines, JJ. 3
    Department of Public Utilities. Practice, Civil, Review of
    order of Department of Public Utilities. Electric
    Company. Public Utilities, Electric company, Judicial
    review. Gas. Administrative Law, Judicial review,
    Rulemaking, Agency's authority, Rate regulation. Statute,
    Construction.
    Civil actions commenced in the Supreme Judicial Court for
    the county of Suffolk on October 26 and November 2, 2015.
    1
    ENGIE Gas & LNG LLC (ENGIE) filed its petition under its
    previous name, GDF Suez Gas NA LLC.
    2
    Conservation Law Foundation   vs.   Department of Public
    Utilities.
    3
    Justice Cordy participated in the deliberation on this
    case and authored this opinion prior to his retirement.
    Justices Spina and Duffly participated in the deliberation on
    this case prior to their retirements.
    2
    The cases were reported by Cordy, J.
    Thaddeus A. Heuer (Adam P. Kahn & Jesse Harlan Alderman
    with him) for ENGIE Gas & LNG LLC.
    David K. Ismay for Conservation Law Foundation.
    Seth Schofield, Assistant Attorney General, for the
    Attorney General.
    Thomas H. Hayman, Special Assistant Attorney General
    (Francis R. Powell, Special Assistant Attorney General, with
    him) for the Department of Public Utilities.
    Cheryl M. Kimball & Matthew A. Sanders, for NSTAR Electric
    Company & others, amici curae, submitted a brief.
    CORDY, J.   These consolidated appeals are before us on a
    single justice's reservation and report of challenges made to an
    order of the Department of Public Utilities (department).   Those
    challenges raise the question of the department's authority to
    review and approve ratepayer-backed, long-term contracts entered
    into by electric distribution companies for additional natural
    gas pipeline capacity in the Commonwealth pursuant to G. L.
    c. 164, § 94A, which requires gas and electric companies to
    receive departmental approval for any contract for the purchase
    of gas or electricity lasting longer than one year.
    The plaintiffs, ENGIE Gas & LNG LLC and Conservation Law
    Foundation, contend that the order amounted to improper
    rulemaking in violation of the Administrative Procedure Act,
    G. L. c. 30A.    They also argue that the department's
    determination that it has authority pursuant to G. L. c. 164,
    § 94A, to approve such contracts constitutes an error of law
    3
    because it contravenes G. L. c. 164, § 94A, as amended through
    St. 1997, c. 164 (restructuring act). 4
    We disagree that the order of the department is an
    improperly promulgated rule or regulation.   We nevertheless
    reach the statutory question presented by the plaintiffs, and
    conclude that the order is invalid in light of the statutory
    language and purpose of G. L. c. 164, § 94A, as amended by the
    restructuring act, because, among other things, it would
    undermine the main objectives of the act and reexpose ratepayers
    to the types of financial risks from which the Legislature
    sought to protect them. 5,6
    4
    Statute 1997, c. 164 (restructuring act), discussed infra,
    restructured the electric utility industry, transforming "it
    from a government-regulated monopoly, to 'a framework under
    which competitive producers [would] supply electric power and
    customers [would] gain the right to choose their electric power
    supplier.'" Northeast Energy Partners, LLC v. Mahar Regional
    Sch. Dist., 
    462 Mass. 687
    , 695 (2012), quoting St. 1997, c. 164,
    § 1 (c) (ii). Importantly, the restructuring act separated the
    three utility services of generation, transmission, and
    distribution, and deregulated the generation component in the
    interests of competition. Northeast Energy Partners, LLC, supra
    at 696. Companies providing transmission and distribution
    services remain regulated by the State. 
    Id. 5 Because
    we determine that the Department of Public
    Utilities (department) erred in interpreting its authority under
    G. L. c. 164, § 94A, we need not reach the question of Federal
    law presented by ENGIE.
    6
    We acknowledge the amicus briefs submitted by the Attorney
    General and by NSTAR Electric Company and Western Massachusetts
    Electric Company, each doing business as Eversource Energy, and
    Massachusetts Electric Company and Nantucket Electric Company,
    each doing business as National Grid.
    4
    1.   Background.   The department regulates the rates that
    both electric distribution companies 7 and local distribution
    natural gas companies 8 may charge their customers (ratepayers).
    G. L. c. 164, § 94A.    See Fitchburg Gas & Elec. Light Co.
    v. Department of Pub. Utils., 
    460 Mass. 800
    , 801
    (2011); Attorney Gen. v. Department of Pub. Utils., 
    453 Mass. 191
    , 192 (2009).
    In 2015, the Department of Energy Resources (DOER) filed a
    petition asking the department to investigate the means by which
    new natural gas delivery capacity 9 might be added to the New
    7
    An electric distribution company is the "arm of a utility
    responsible for transmitting electricity from a generation
    facility or power grid to the end consumer." Franklin W. Olin
    College Of Eng'g v. Department of Telecomm. & Energy, 
    439 Mass. 857
    , 860 n.6 (2003). See G. L. c. 164, § 1 (defining
    "[d]istribution company"). Electric distribution companies
    provide two types of services: supply services and distribution
    services. See NSTAR Elec. Co. v. Department of Pub. Utils., 
    462 Mass. 381
    , 381 (2012).
    8
    Local gas distribution companies "mak[e] and sell[] or
    distribut[e] and sell[] . . . gas within the commonwealth."
    See G. L. c. 164, § 1 (defining "[g]as company").
    9
    Prior to the Federal restructuring of interstate pipeline
    service by the Federal Energy Regulatory Commission (FERC) (see
    FERC Order No. 639, 18 C.F.R. Part 284 [Apr. 8, 1992]), gas and
    the pipeline space, or "capacity," necessary to deliver it were
    "bundled," or sold together. Once "unbundled," the department
    recognized the distinction between the two elements of
    interstate gas services as "blurred, at best" and established
    that contracts for both would be similarly approved as
    "contract[s] for the purchase of gas" pursuant to G. L. c. 164,
    § 94A, under the same "public interest standard." D.P.U. 94-
    5
    England market in order to mitigate price volatility experienced
    by ratepayers in the Commonwealth, especially in the winter
    months.   See D.P.U. 15-37 (Oct. 2, 2015).   The DOER specifically
    asked whether the department, pursuant to its authority under
    G. L. c. 164, § 94A, could approve long-term contracts 10 by
    Massachusetts electric distribution companies for the purchase
    and resale of interstate natural gas pipeline capacity.    The
    DOER stated that the ultimate goal of such purchases would be to
    lower "gas constraint-driven high prices" for electricity in New
    England by lowering the prices, particularly in the wintertime,
    of wholesale electricity across the region.
    In support of its request, the DOER asserted that gas
    pipeline constraints have caused unreasonably high winter
    electric prices in New England.   Unlike local natural gas
    distribution companies, which regularly contract for gas
    capacity, electric generators that use natural gas to produce
    electricity 11 are generally unwilling or unable to enter into
    long-term contracts to secure firm gas capacity.   For these
    generators, there is added risk for such contracting because
    174-A, at 22-26 (Mar. 15, 1994). We therefore use the terms
    "gas" and "gas capacity" interchangeably.
    10
    By the terms of G. L. c. 164, § 94A, any contract in
    excess of one year constitutes a long-term contract.
    11
    Generation is "the act or process of transforming other
    forms of energy into electric energy or the amount of electric
    energy so produced." G. L. c. 164, § 1.
    6
    there is no means by which they can be reasonably assured of
    receiving enough revenue to cover the cost of securing the gas
    capacity over the course of each year.   Pipeline companies, on
    the other hand, are not willing to build new pipeline capacity
    without having long-term contracts in place.   Thus, pipeline
    companies do not have sufficient assurances such that they are
    willing to build additional pipeline capacity for natural gas-
    fired electric generators, despite the increasing natural gas
    demand for heating and as a source of supply for electric power.
    The DOER characterized this situation as a "mismatch" of needs
    and incentives that requires a "solution."
    Under the DOER's proposal, (1) the department would
    authorize, pursuant to G. L. c. 164, § 94A, electric
    distribution companies to enter into contracts to purchase gas
    pipeline transportation capacity to be funded by the
    Commonwealth's ratepayers through rates set and approved by the
    department; (2) the pipeline owners (which in this case will
    include affiliates of electric distribution companies) will use
    those transportation contracts to help finance the construction
    of new gas pipeline capacity in the region; (3) after the
    pipelines are expanded, the electric distribution companies will
    release (resell) their contracted-for capacity to electric
    7
    generators or "into the market"; 12 and (4) the release of that
    capacity will increase gas supply and thus lower the wholesale
    price of gas and electricity.
    Noting that the question was one of first impression, the
    DOER asked the department to determine whether "(1) there is an
    innovative mechanism for electric distribution companies . . .
    or other suitable parties to secure new, incremental gas
    delivery capacity into the region to the benefit of electric
    ratepayers; (2) review for cost-recovery of [electric
    distribution company] contracts for natural gas capacity by the
    [d]epartment under G. L. c. 164, § 94A . . . is appropriate; and
    (3) the standard of review the [d]epartment would apply to
    contracts submitted for approval under that section should be
    different."   The DOER stated that ratepayer-funded gas capacity
    contracts entered into by electric distribution companies would
    solve the "mismatch" problem by providing sufficient financial
    assurance to pipeline companies to build new pipelines and
    infrastructure in order to provide gas to natural gas-fired
    electric generators.
    12
    Citing to Order Accepting and Suspending Tariff Record
    and Establishing a Technical Conference, 154 FERC, ¶ 61,269
    (Mar. 31, 2016), the Attorney General, in her brief, points out
    that in order to release the contracted-for capacity to the
    electric generation companies, the electric distribution
    companies would first need to obtain a waiver from FERC, because
    Federal law otherwise prohibits resellers from directing their
    contracted capacity rights to a particular party unless FERC
    grants a waiver. See also 18 C.F.R. § 284.8 (2015).
    8
    In response to the petition of the DOER, the department
    opened an investigation into the means by which new natural gas
    capacity might be added to the New England market, including
    measures that electric distribution companies might pursue.
    After considering input from stakeholders, including written
    comments submitted by the plaintiffs, the department issued
    D.P.U. 15-37, entitled, "Order Determining Department Authority
    Under G. L. c. 164, § 94A" (order).    The department determined
    that the plain language of § 94A provides the department with
    the statutory authority to approve gas capacity contracts
    entered into by electric distribution companies, so long as the
    department first determines that such long-term contracts are in
    the public interest.   D.P.U. 15-37, at 19, 43.   The department
    further concluded that it could properly allow cost recovery for
    the contracts, including the cost of building the necessary
    pipeline infrastructure, through electric distribution
    rates.   
    Id. at 12,
    46.   The department additionally determined
    that its findings were consistent with the restructuring act
    because the contracts entered into by the electric distribution
    companies would not result in the companies' reentry to
    producing, manufacturing, or generating electricity at
    wholesale, as contemplated by the restructuring act.     
    Id. at 26-
    27.
    9
    The order further outlined the filing requirements and
    standard of review applicable to future proceedings seeking
    approval of ratepayer-backed contracts for gas capacity entered
    into by electric distribution companies.      
    Id. at 36,
    44-45.
    Since issuing the order, the department has docketed three
    petitions by electric distribution companies for the approval of
    such contracts; however, none has been approved at this time.
    The contemplated contracts are for a term of twenty years.
    In October and November, 2015, the plaintiffs filed
    separate petitions in the Supreme Judicial Court for Suffolk
    County pursuant to G. L. c. 25, § 5, asking that the order be
    set aside on the ground that it is based on an erroneous
    interpretation of law.    A consolidated hearing was held before
    the single justice, who denied the motions for judgment of
    default and reserved and reported the matters to the full
    court. 13
    2.    Propriety of appeal.   We first consider whether this
    appeal is properly before us.      The plaintiffs ask the court to
    review the department's order pursuant to G. L. c. 25, § 5,
    which authorizes "an appeal as to matters of law from any final
    decision, order or ruling."    The department argues, however,
    13
    The plaintiffs also filed motions to stay the
    department's order, D.P.U. 15-37 (Oct. 2, 2015) (order), which
    would have halted the contract review process. The motions were
    denied without prejudice.
    10
    that the order is not the product of an adjudicatory proceeding,
    nor did it adjudicate the rights of the plaintiffs; therefore,
    it is not appealable under § 5.      See Providence & Worcester R.R.
    v. Energy Facilities Siting Bd., 
    453 Mass. 135
    , 140 (2009) ("A
    decision is 'final' for purposes of taking an immediate appeal
    if it completely adjudicates the rights of the parties, leaving
    nothing further to be decided").
    We previously have held that where, as here, an agency
    determines that it has statutory authority to act, but has not
    yet exercised that authority, "such a decision is not 'final'
    for the purposes of judicial review under G. L. c. 25,
    § 5."     
    Id. Nevertheless, we
    reach the merits of the question of
    law submitted to us by the parties because "the case has been
    fully briefed on the merits, . . . there is a public interest in
    obtaining a prompt answer to the question, and . . . the answer
    . . . is reasonably clear."       
    Id., quoting Brown
    v. Guerrier, 
    390 Mass. 631
    , 632 (1983). 14
    3.   Discussion.   General Laws c. 164, § 94A, provides in
    relevant part that "[n]o gas or electric company shall hereafter
    enter into a contract for the purchase of gas or electricity
    covering a period in excess of one year without the approval of
    the department, unless such contract contains a provision
    14
    In light of this conclusion, we do not reach the
    plaintiffs' argument that the order was issued in violation of
    the Administrative Procedure Act, G. L. c. 30A.
    11
    subjecting the price to be paid thereunder for gas or
    electricity to review and determination by the department in any
    proceeding brought under [§ 93 or 94]."
    In its order, the department concluded that the plain
    language of § 94A provides it with the authority to review and
    approve "the purchase of gas or electricity" by "gas or electric
    companies."   D.P.U. 15-37, at 19.     It reasoned that the word
    "'or' . . . is used to list the entities (gas and electric
    companies) and the products (gas and electric purchases) and
    does not limit one type of company or one type of product."        
    Id. Rather, the
    department ruled that the provision grants it broad
    "authority over both electric and gas distribution companies,
    without direct limiting language."      
    Id. The department
    further
    concluded that because the meaning of the statute could be
    discerned from the plain language, the department need not
    "consider legislative history or doctrines of statutory
    construction."   
    Id. Moreover, the
    department found that the
    restructuring act did not present an impediment to electric
    distribution companies contracting for natural gas capacity
    subject to department review and approval because the framework
    established by the department would not result in the electric
    distribution companies' reentry to producing, manufacturing, or
    generating electricity for sale at wholesale, as contemplated by
    the restructuring act.    
    Id. at 27.
       See St. 1997, c. 164, § 193.
    12
    The plaintiffs counter that this interpretation of § 94A
    misapprehends the rules of statutory construction and is
    inconsistent with the larger statutory context of c. 164, as
    well as legislative policymaking embodied in the restructuring
    act.
    a.    Standard of review.   We review the validity of a policy
    adopted by an agency charged with implementing and enforcing
    State statutes under the same two-part framework used to
    determine whether regulations promulgated by an agency are
    valid.      Franklin Office Park Realty Corp. v. Commissioner of the
    Dep't of Envtl. Protection, 
    466 Mass. 454
    , 459-460 (2013).
    First, we employ "the conventional tools of statutory
    interpretation" to determine "whether the Legislature has spoken
    with certainty on the topic in question."       Goldberg v. Board of
    Health of Granby, 
    444 Mass. 627
    , 632–633 (2005).      Where the
    court determines that a statute is unambiguous, we will reject
    any agency interpretation that does not give effect to the
    Legislative intent.      Franklin Office Park Realty Corp., supra at
    460.
    If we conclude that "the Legislature has not directly
    addressed the issue and the statute is capable of more than one
    rational interpretation, we proceed to determine whether the
    agency's interpretation may be reconciled with the governing
    legislation" (quotation and citation omitted).       Biogen IDEC MA,
    13
    Inc. v. Treasurer & Receiver Gen., 
    454 Mass. 174
    , 187 (2009).
    We defer to the agency's interpretation insofar as it is
    reasonable.    Franklin Office Park Realty 
    Corp., 466 Mass. at 460
    .    Statutory interpretation, however, is ultimately the duty
    of the courts, and the "principle of according weight to an
    agency's discretion . . . is one of deference, not abdication,
    and this court will not hesitate to overrule agency
    interpretations of statutes or rules when those interpretations
    are arbitrary or unreasonable" (quotations and citation
    omitted).    Moot v. Department of Envtl. Protection, 
    448 Mass. 340
    , 346 (2007), S.C., 
    456 Mass. 309
    (2010).
    Our interpretation is not limited only to determining a
    statute's "simple, literal or strict verbal meaning" but also
    considers a statute's "development, [its] progression through
    the legislative body, the history of the times, prior
    legislation, contemporary customs and conditions and the system
    of positive law of which they are part . . ."    Kain
    v. Department of Envtl. Protection, 
    474 Mass. 278
    , 286 (2016),
    quoting Oxford v. Oxford Water Co., 
    391 Mass. 581
    , 588 (1984).
    Applying these rules to the statutory language at issue, we
    conclude that the department erred in determining that § 94A, as
    amended by the restructuring act, authorizes the department to
    review and approve ratepayer-backed, long-term contracts for gas
    capacity entered into by electric distribution companies.
    14
    b.   Section 94A.   The parties do not dispute that § 94A has
    traditionally been construed by the department to apply to gas
    company purchases of gas and electric company purchases of
    electricity.    Nonetheless, the department argues, nothing in the
    plain language of the provision prohibits the department from
    approving long-term contracts by electric distribution companies
    for gas. 15   Moreover, the department insists that because the
    language is unambiguous, the court need not employ the usual
    canons of statutory construction.
    The plaintiffs ask the court to read § 94A distributively
    in accordance with the canon reddenda singula singulis, also
    known as the rule of the last antecedent, see Ross, A Rule of
    Last Resort:    A History of the Doctrine of the Last Antecedent
    in the United States Supreme Court, 39 Sw. L. Rev. 325, 325
    15
    In its order, the department provided a single basis for
    its authority to approve long-term gas contracts by electric
    distribution companies: the language of G. L. c. 164, § 94A.
    See D.P.U. 15-37, at 14, 17-21. See 
    id. at 15
    n.16 (expressly
    rejecting declining to address other potential bases for
    authority). On appeal, however, the department provides several
    other potential bases of statutory authority for its conclusion,
    including G. L. c. 164, §§ 69I, 76, 93, and 94. We do not
    specifically consider these statutory bases, as they were not
    relied on in the department's order, and the court will not
    otherwise "supply a reasoned basis for the [department’s] action
    that the agency itself has not given" (citation omitted), NSTAR
    Elec. Co. v. Department of Pub. 
    Utils., 462 Mass. at 387
    . We
    nonetheless reject the department's arguments with respect to
    these provisions insofar as we determine that the over-all
    statutory scheme of G. L. c. 164 supports the plaintiffs'
    interpretation of § 94A as prohibiting the type of contracts
    contemplated by the department's order.
    15
    (2009), which states that "[w]here a sentence contains several
    antecedents and several consequents, courts read them
    distributively and apply the words to the subjects which, by
    context, they seem most properly to relate."    2A N.J. Singer &
    S. Shambie, Statutes and Statutory Construction § 47:26 (7th ed.
    2014).   Applying this canon to the text, the plaintiffs argue
    that the parallel uses of the word "or" in the first sentence of
    § 94A can be read only in a manner that authorizes the
    department to approve electric company contracts for the
    purchase of electricity, and gas company contracts for the
    purchase of gas.
    The department argues, however, that we must disregard this
    maxim because the court uses aids of statutory construction only
    where the words of the statute are ambiguous.   This argument
    misapprehends the task of statutory interpretation.   The court
    does not determine the plain meaning of a statute in isolation,
    but rather concludes that a statute is unambiguous only after
    "consider[ing] the specific language of a statute in connection
    with the statute as a whole and in consideration of the
    surrounding text, structure, and purpose of the Massachusetts
    act," Custody of Victoria, 
    473 Mass. 64
    , 73 (2015), in light of
    the "standard rules of statutory construction and grammar"
    (citation omitted).   Rowley v. Massachusetts Elec. Co., 
    438 Mass. 798
    , 802 (2003).
    16
    Whether the rule of the last antecedent is characterized as
    a rule of construction or one of grammar, it is the type of
    intrinsic aid we regularly use to discern the meaning of a
    statute.     Although application of the rule here supports the
    plaintiffs' reading of the statute as prohibiting the
    department's review and approval of gas capacity contracts by
    electric distribution companies, it is not dispositive, because
    the rule "is not an absolute and can assuredly be overcome by
    other indicia of meaning."     Barnhart v. Thomas, 
    540 U.S. 20
    , 26
    (2003).
    It is true, as the department points out, that the language
    of § 94A does not expressly forbid it from reviewing and
    approving contracts by electric distribution companies for gas.
    Nor, however, does the language clearly permit such activity.
    See Entergy Nuclear Generation Co. v. Department of Envtl.
    Protection, 
    459 Mass. 319
    , 331 (2011) ("Where . . . the scope of
    agency authority is at issue, we must determine whether the
    agency is acting within the powers and duties expressly
    conferred upon it by statute and such as are reasonably
    necessary to carry out its mission" [quotation and citation
    omitted]).    Thus, to the extent that "the language is not
    conclusive as to the Legislature's intent, we may seek guidance
    from the legislative history."     Commonwealth v. Garrett, 
    473 Mass. 257
    , 260 (2015).    Moreover, taking this history together
    17
    with the development of § 94A and its place with the larger
    statutory framework of G. L. c. 164, we conclude that the
    Legislature did not intend to authorize the department to
    approve the contracts contemplated in its order, but rather
    intended, with limited exceptions, to regulate the gas and
    electric utilities differently.
    We begin by describing G. L. c. 164, § 94A, as it was
    originally enacted in 1926.   The provision stated:   "No electric
    company shall hereafter enter into a contract for the purchase
    of electricity covering a period in excess of three years
    without the approval of the department . . . ."   St. 1926,
    c. 298.   Section 94A was enacted to address concerns that newly
    consolidated "interlocking companies" would enter into contracts
    "for the interchange of electricity," and that the department
    might have to accept those non-arms' length transactions in
    later-filed electricity rate cases.   See 1926 House Doc. No.
    153, at 2.
    Concerns remained, however, about how the expansion of
    holding companies and the consolidation of electric utilities
    under them would impact ratepayers.   In light of these concerns,
    the Legislature created a special commission to investigate the
    control and conduct of public utilities in the Commonwealth.
    See Report of the Special Commission on Control and Conduct of
    Public Utilities (commission), 1930 House Doc. No. 1200, at 7
    18
    (1930 special report).     Unlike a similar report prepared in 1925
    that recommended the enactment of § 94A, but did not reference
    gas companies in the relevant discussion, see 1926 House Doc.
    No. 153, at 2, the commission was instructed to investigate both
    electric and gas companies.    1930 special report, supra at 7-9.
    The special report reflects apprehensions about the
    consolidation of independent operating companies, and how those
    consolidations might unjustly increase ratepayer cost for gas
    and electricity.    
    Id. at 15-16,
    34, 46-47, 52-53, 68-69, 240-
    241.
    The report informs our understanding of the history of
    § 94A, as it reveals why the Legislature sought to extend St.
    1926, c. 298, to gas companies:    the commission predicted that
    the same concerns about electric companies would arise with
    respect to gas companies as well.    
    Id. at 41-42.
      Finding that
    St. 1926, c. 298, provided "valuable protection against
    excessive charges for electricity," the report recommended
    extending the existing statute to cover gas company contracts
    for the purchase of gas.    See 
    id. at 67-68.
      Importantly, the
    special report did not appear to contemplate gas company
    purchases of electricity or electric company purchases of gas.
    To the contrary, the text of the special report supports the
    plaintiffs' position that the electric and gas industries were
    regulated separately.    See, e.g., 
    id. at 74
    ("There is no
    19
    necessary connection between the two kinds of business"); 
    id. at 15
    n.2, citing G. L. c. 164, §§ 22, 23 ("An electric company
    could not deal in gas under any circumstances").   The
    recommended bill was enacted in May, 1930, and appears in
    substantially the same form today.   Compare St. 1930, c. 342,
    with G. L. c. 164, § 94A.   Following the 1930 amendment, § 94A
    provided:   "No gas or electric company shall hereafter enter
    into a contract for the purchase of gas or electricity covering
    a period in excess of two years without the approval of the
    department . . ." (emphasis supplied).   St. 1930, c. 342. 16
    The department and the plaintiffs offer competing
    interpretations of this history.   The department argues that
    this history does not support any finding of legislative intent
    to restrict the commodities to be purchased by utilities, or the
    types of contracts that would be subject to department review,
    but rather only to limit the power of the holding companies that
    had come to dominate the gas and electric industries.    Thus, in
    the department's view, the concerns that prompted the amendment
    arose from a desire to protect ratepayers from excessive rates,
    with no indication that the department should be limited in its
    16
    The statute was further amended in 1941 to change the
    contract period from two years to one year. St. 1941, c. 400.
    At the time of the 1930 amendment, the Legislature had already
    used the "gas or electric company" or "gas or electricity"
    construction numerous times elsewhere in G. L. c. 164. G. L.
    (Ter. Ed.) c. 164 (1932), §§ 5, 11, 15-18, 30, 34, 42-43, 45-46,
    55-56, 58, 60-69, 78-79, 81-84, 89, 92-96, 116-117, 124-125.
    20
    ability to review any type of commodity contract by any type of
    utility company.
    The plaintiffs disagree, and argue that the introduction of
    the new language in the 1930 amendment did not alter or expand
    the meaning of existing and unchanged statutory language because
    the Legislature did not express any intent to do so.     See Foster
    v. Group Health Inc., 
    444 Mass. 668
    , 674 (2005) ("provisions of
    [an] amendatory act [are] to be considered together with
    provisions of [the] original act").   Thus, they argue, the 1930
    amendment was not made with the intent to expand electric
    company contracting authority to include the purchase of gas,
    but rather to expand the department authority to regulate gas
    company contracts for gas in addition to electric company
    contracts for electricity.
    We agree, and conclude that the history and development of
    the statute supports the plaintiffs' distributive reading of the
    terms "gas or electric."   In light of the history, as well as
    the different regulatory treatment of gas and electric
    utilities, it is apparent that the addition of the term "gas" to
    § 94A was not meant to expand the department's authority to
    review any type of commodity contract by any type of utility,
    but rather to ensure that gas companies were not free to engage
    in the types of transactions that might harm ratepayers when
    electric companies were prohibited from doing so.
    21
    Moreover, our conclusion that the Legislature intended to
    regulate gas and electric utilities differently is supported by
    other language in the statute, including the express, non-
    overlapping definitions of "gas company" and "electric company,"
    even if the corporate entity engaging in one of those defined,
    regulated businesses is "subsequently authorized" to also
    perform the other function.   See G. L. c. 164, §§ 1, 8A. 17
    17
    General Laws c. 164, § 1, defines an electric company as
    follows:
    "a corporation organized under the laws of the commonwealth
    for the purpose of making by means of water power, steam
    power or otherwise and for selling, transmitting,
    distributing, transmitting and selling, or distributing and
    selling, electricity within the commonwealth, or authorized
    by special act so to do, even though subsequently
    authorized to make or sell gas; provided, however, that
    electric company shall not mean an alternative energy
    producer; provided further, that a distribution company
    shall not include an entity which owns or operates a plant
    or equipment used to produce electricity, steam and chilled
    water, or an affiliate engaged solely in the provision of
    such electricity, steam and chilled water, where the
    electricity produced by such entity or its affiliate is
    primarily for the benefit of hospitals and nonprofit
    educational institutions, and where such plant or equipment
    was in operation before January 1, 1986; and provided
    further, that electric company shall not mean a corporation
    only transmitting and selling, or only transmitting,
    electricity unless such corporation is affiliated with an
    electric company organized under the laws of the
    commonwealth for the purpose of distributing and selling,
    or distributing only, electricity within the commonwealth."
    A gas company is defined as "a corporation organized for
    the purpose of making and selling or distributing and selling,
    gas within the commonwealth, even though subsequently authorized
    to make or sell electricity; provided, however, that gas company
    shall not mean an alternative energy producer." 
    Id. 22 Indeed,
    the department's own order acknowledges the "different
    regulatory treatment of a [local distribution gas company] and
    [electric distribution companies]."   D.P.U. 15-37, at 43.
    The larger statutory context in which the term "gas or
    electric" is used extensively in G. L. c. 164 is also
    instructive.   For example, G. L. c. 164, § 116, gives a duly
    authorized officer or employee of "a gas or electric company
    . . . [the right to] enter any premises supplied with gas or
    electricity by such company for the purpose of examining or
    removing the meters, pipes, wires, fittings and works for
    supplying or regulating the supply of gas or electricity and of
    ascertaining the quantity of gas or electricity consumed or
    supplied" (emphasis added).   In an emergency, fire and police
    officers must allow such an authorized representative "of a gas
    or electric company . . . to enter any area or building in order
    to shut off the gas or electricity, which is or may become a
    source of danger to the public" (emphasis added).   G. L. c. 164,
    § 116A.   See G. L. c. 164, § 93 (granting department authority,
    on notice and investigation following written complaint "either
    as to the quality or price of the gas or electricity sold and
    delivered, . . . [to] order any reduction or change in the price
    or prices of gas or electricity or an improvement in the quality
    thereof" [emphasis added]); G. L. c. 164, § 76A (department has
    authority to supervise affiliate of both gas and electric
    23
    companies with respect to extent of their activities that
    "affect the operations of" any gas or electric company they are
    affiliated with, directing that "[s]uch relations, transactions
    and dealings, including any payments by a gas or electric
    company to such an affiliated company for services or materials
    and supplies which enter into the manufacture, distribution or
    sale of gas or electricity, shall be subject to review and
    investigation by the department in any proceeding brought under
    [G. L. c. 164, §§ 93-94]" [emphasis added]).
    The department, however, argues that reading the words "gas
    or electricity" distributively throughout G. L. c. 164 would
    lead to absurd results that could not have been intended by the
    Legislature.   The department notes that it may authorize an
    electric company to "engage in the business of a gas company"
    and a gas company "to engage in the business of an electric
    company" if it "deems the public convenience will be promoted
    thereby" pursuant to G. L. c. 164, § 8A.   Thus, the department
    argues, if the court were to adopt the distributive reading of
    c. 164 suggested by the plaintiffs, a gas company authorized to
    engage in the sale of electricity pursuant to G. L. c. 164,
    § 8A, for example, would not be required to report accidents
    caused by electricity it supplied where someone was killed (see
    G. L. c. 164, § 95); would be unable to enter any area or
    building to shut off electricity which is or may become a source
    24
    of danger to the public (see G. L. c. 164, § 116A); and would be
    unable to stop service to a person who failed to pay his or her
    electricity bill (see G. L. c. 164, § 124).
    These arguments are not persuasive.   The "absurdities"
    identified by the department are easily resolved by consistently
    treating "gas companies" and "electric companies" separately
    throughout c. 164, as required by their statutory definitions.
    Moreover, if a gas company were to amend its corporate charter
    and obtain approval from the department under G. L. c. 164,
    § 8A, to also engage in the business of an electric company, as
    the department hypothesizes, it would plainly also meet the
    statutory definition of "electric company" pursuant to G. L.
    c. 164, § 1, and so would expressly be subject to the statutory
    provisions cited to by the department.
    A final factor supports our conclusion that the Legislature
    did not intend to authorize the department to approve electric
    distribution company contracts for gas capacity and vice versa.
    Although we defer to an agency's reasonable interpretation of a
    statute it is charged with enforcing, "[t]he appropriate weight
    (of such interpretation), in a particular case, will depend on a
    variety of factors, including whether the agency participated in
    the drafting of the legislation . . . , whether the
    interpretation dates from the enactment of the legislation, and
    whether it has been consistently applied" (citations
    25
    omitted).   Board of Educ. v. Assessor of Worcester, 
    368 Mass. 511
    , 515-516 (1975).
    In this case, we have not located (nor has the department
    identified) any instance of the department approving, pursuant
    to § 94A, a contract for electricity by a gas company, or a
    contract for gas by an electric company in the eighty-six year
    period since the 1930 amendment.   Moreover, before issuing the
    order, the department had never interpreted § 94A to authorize
    its approval of such contracts; to the contrary, its prior
    orders suggest that the department also had adopted a
    distributive construction of the statute's language with the
    term gas relating to gas companies and the term electricity
    relating to electric companies.    See, e.g., D.P.U. 95-67, at 21
    (Oct. 10, 1995) ("G. L. c. 164, § 94A, requires gas and electric
    companies to file for [d]epartment approval all contracts for
    the purchase of gas or electricity of a duration greater than a
    year" [emphasis added]); D.T.E. 02-50, at 2 (Sept. 23, 2002)
    (same); D.P.U. 86-247, at 7 (Dec. 4, 1987) ("Under [§] 94A, any
    electric company who contracts for the purchase of electricity
    for a period in excess of one year must submit the contract for
    review").   The department's order here thus represents a
    significant departure from its own history of administering
    26
    § 94A and its separate treatment of the gas and electric
    utilities. 18
    In light of these considerations, we conclude that the
    department erred in interpreting § 94A as authorizing it to
    review and approve ratepayer-backed, long-term contracts by
    electric distribution companies for gas capacity (or contracts
    by gas companies).
    c.   Restructuring act of 1997.     We further conclude that
    the department's interpretation of § 94A is untenable in light
    of the 1997 restructuring act, which amended G. L. c. 164 ("An
    Act relative to restructuring the electric utility industry in
    the Commonwealth, regulating the provision of electricity and
    other services, and promoting enhanced consumer protections
    therein").      "Any judicial review of agency action embodies the
    principle that an agency has no inherent authority beyond its
    enabling act and therefore it may do nothing that contradicts
    such legislation."      Globe Newspaper Co. v. Beacon Hill
    Architectural Comm'n, 
    421 Mass. 570
    , 586 (1996).       For the
    18
    See also 220 Code Mass. Regs. §§ 11.00 (2016)
    (department's rules governing restructuring of electric industry
    silent as to whether restructured electric distribution company
    being able to purchase gas or be compensated therefor); D.P.U.
    94-174-A, at 1-2 (Mar. 15, 1994) (in designing and establishing
    "single standard based on the public interest" to be applied to
    all gas commodity contracts -- for both the gas itself, and for
    the pipeline capacity necessary to transport it -- the
    department entertained comments only from, included analysis
    only regarding, and designed the standard only for, gas
    companies).
    27
    reasons discussed herein, we determine that the department's
    approval of ratepayer-backed, long-term contracts by electric
    distribution companies for gas capacity contradicts the
    fundamental policy embodied in the restructuring act, namely the
    Legislature's decision to remove electric distribution companies
    from the business of electric generation.
    Prior to the passage of the restructuring act, electric
    companies were vertically integrated monopolies, controlling the
    generation, transmission, and distribution of electricity.
    See Northeast Energy Partners, LLC v. Mahar Regional Sch. Dist.,
    
    462 Mass. 687
    , 695 (2012).   Recognizing that "the interests of
    consumers [could] best be served by an expedient and orderly
    transition from regulation to competition in the generation
    sector consisting of the unbundling of prices and services and
    the functional separation of generation services from
    transmission and distribution services," St. 1997, c. 164,
    § 1 (m), the Legislature enacted the act to separate these three
    utility services and open the supply of generation services to
    competition.   Northeast Energy Partners, LLC, supra at 696-697.
    This functional separation of services, which limited a
    "'company's ability to provide itself an undue advantage in
    buying or selling services in competitive markets,' was regarded
    as a necessary first step in moving toward 'a fully competitive
    28
    generation market based on customer choice.'"     
    Id. at 697,
    quoting D.P.U. 95–30, at 16 (Aug. 16, 1995).
    The restructuring act also removed "the business of
    producing, manufacturing, or generating electricity," from the
    department’s supervisory authority.   See St. 1997, c. 164,
    §§ 189, 193.   Following the transfer by Commonwealth utilities
    of all generation facilities to separate ownership, no portion
    of the business of a generating company could "be subject to
    regulation as a public utility or as an electric company."      St.
    1997, c. 164, § 193; G. L. c. 164, § 1A (e).
    Additionally, by deregulating the generation component of
    the electric utility industry, electric distribution companies
    were discharged from their duties to plan for, build, and
    operate or profit from the making and selling of electricity.
    Instead, the business of electric distribution companies is to
    plan for, build, and operate distribution infrastructure (e.g.,
    poles, wires, and substations); deliver electricity; and be
    compensated for doing so.   See, e.g, G. L. c. 164, § 1, inserted
    by St. 1997, c. 164, § 187 (defining "[d]istribution company,"
    "[d]istribution service," and "[d]istribution facility").
    Recognizing the circumscribed role of electric distribution
    companies after the restructuring act, the department exempted
    them from their prerestructuring act business obligations
    relating to fuel management and power planning.    First, in 1998,
    29
    the department acknowledged that the electric distribution
    companies would no longer be buying fuel for power plants or
    recovering from ratepayers the cost of fuel.     Accordingly, the
    department exempted electric distribution companies from the
    previous fuel procurement and cost recovery program under G. L.
    c. 164, § 94G.    D.T.E. 98-13, at 4 (Feb. 20, 1998). 19
    The department also exempted electric distribution
    companies from G. L. c. 164, § 69I, which had imposed a power
    planning requirement on the electric utilities, and instead
    directed distribution companies to focus exclusively on
    distribution.    D.T.E. 98-84, at 1-2 (Aug. 10, 1998).     Section
    69I had required electric companies to assess expected customer
    electricity demand over a ten-year period and ensure that they
    would have the right fuel and infrastructure mixture to serve
    that expected demand. 20   In exempting electric distribution
    19
    As relevant here, G. L. c. 164, § 94G, required companies
    to demonstrate to the department that their plans to procure
    fuel for their power plants would "maintain sufficient reserves
    of power for purposes of reliability and efficiency." G. L.
    c. 164, § 94G (a). Section 94G (a) also allowed electric
    companies to recover their fuel costs from customers and adjust
    the rate based on fluctuations in fuel prices. See generally
    Consumers Organization for Fair Energy Equality, Inc. v.
    Department of Pub. Utils., 
    368 Mass. 599
    , 601-602 (1975).
    20
    In relevant part, G. L. c. 164, § 69I, required that
    electric companies file biennial forecasts of the electric power
    needs and requirements of its market area for the ensuing ten-
    year period. D.T.E. 98-84/EFSB 98-5, at 1 (Aug. 8, 2003).
    Prior to the restructuring act, the department used this device
    to regulate electric companies' "procurement of and cost
    30
    companies from § 69I, the department recognized that the
    restructuring act relieved such companies from their obligation
    to "forecast[], plan[], solicit[] and procur[e] long-term
    electricity supplies for their customers."    D.T.E. 98-84, at 1
    (Aug. 10, 1998).
    Thus, the department's exemption of electric distribution
    companies from both §§ 94G and 69I signaled its recognition that
    electric distribution companies were leaving all aspects of the
    generation business, including not only power plant
    construction, but also the planning and fuel management aspects
    of generation.
    Moreover, in restructuring the electric industry by
    removing electric distribution companies from the business of
    electric generation, the Legislature "shifted the risks of
    generation development from consumers to generators" to
    "insulate[] [consumers] from construction, operational, and
    price risks . . . inherent in commodity rate regulation."
    D.P.U. 12-77, at 28 (Mar. 15, 2013).    See D.T.E. 98-84, at 2
    (Aug. 10, 1998) ("A market framework based on competition . . .
    will mean that the economic consequences of building too many
    power plants will be borne directly by investors, rather than
    ratepayers").    Through the restructuring act, the Legislature
    recovery associated with . . . resources to meet [their
    customers' electricity needs." 
    Id. 31 sought
    to shift such risk away from ratepayers, who had been
    forced to pay higher rates for electricity as a result of
    "excessive investments" in expensive and poorly managed long-
    lived infrastructure projects.   Black & Pierce, The Choice
    Between Markets and Central Planning in Regulating the U.S.
    Electricity Industry, 93 Colum. L. Rev. 1339, 1344-1345, 1386
    (1993). 21
    In this case, the department's interpretation of § 94A not
    only would permit electric distribution companies to purchase
    resources related to supply of electric generation (in this
    case, natural gas capacity), but also would allow the department
    to regulate such activity and to shift the associated costs to
    ratepayers.   We agree with the plaintiffs that such activity
    would undermine the main object to be accomplished by the
    restructuring act, i.e., to move from a regulated electricity
    supply market to an open and competitive market for power.    See
    St. 1997, c. 164, § 1 (f).   Further, an interpretation of § 94A
    21
    See, e.g., Attorney Gen. v. Department of Pub. Utils.,
    
    390 Mass. 208
    , 219, 222, 228-229 (1983) (affirming department
    decision that authorized electric company to recover, through
    increased rates, costs it incurred in later abandoned Pilgrim II
    nuclear power plant). See also Norwood v. Federal Energy
    Regulatory Comm'n, 
    80 F.3d 526
    , 530-531 (D.C. Cir. 1996)
    (affirming, in part, FERC decision to allow nuclear plant
    operator to recover costs for prematurely closed nuclear plant
    based in Rowe, Massachusetts); Cost of Seabrook Plant Begins to
    Hit Customers, N.Y. Times, Feb. 1, 1987
    (describing Massachusetts ratepayer costs associated with
    construction of Seabrook nuclear power plant).
    32
    that includes approval of pipeline capacity contracts by
    electric distribution companies would contradict the specific
    statutory provisions put in place under G. L. c. 164 to account
    for the divestiture of all generation assets by electric
    distribution companies.   See, e.g., G. L. c. 164, § 1G.
    Accordingly, this interpretation would give rise to an
    inconsistent body of regulatory law.   See D.T.E. 98-84/EFSB 98-5
    (exempting electric distribution companies from G. L. c. 164,
    § 69I, and rescinding 220 Code Mass. Regs. §§ 10.00); D.T.E. 98-
    13 (exempting electric distribution companies from G. L. c. 164,
    § 94G).
    Perhaps most importantly, however, the department's order
    would reexpose ratepayers to the very types of risks that the
    Legislature sought to protect them from when it enacted the
    restructuring act.   Both the DOER and the department noted that
    gas-fired generating businesses are unwilling to assume the
    risks associated with long-term gas pipeline capacity contracts
    because there "is no means by which they can" assure recovery of
    those contract costs.   Shifting that risk onto the electric
    ratepayers of the Commonwealth, however, is entirely contrary to
    the risk-allocation design of the restructuring act.
    Equally unavailing is the department's finding that the
    order does not contravene the policy embodied in the
    restructuring act because it does not allow the use of ratepayer
    33
    funds to construct a power plant.    D.P.U. 15-37, at 27.   As
    prior decisions by this court and the department make clear,
    power plant construction is only one aspect of the electric
    generation market, and in enacting the restructuring act, the
    Legislature sought to separate all aspects of generation from
    all aspects of distribution.   See, e.g., D.T.E. 98-13, at 4;
    D.T.E. 98-84, at 1.
    Moreover, the department itself has recognized that fuel
    procurement and planning is an integral component of the
    generation business, as evidenced by its exemption of electric
    distribution companies from § 69I.    Indeed, by some estimations,
    fuel-related costs constitute seventy-five per cent of a natural
    gas-fired plant's generation costs.    3 World Scientific Handbook
    of Energy 72 (G.M. Crawley ed., 2013).    Accordingly, prior to
    the enactment of the restructuring act, the department required
    electric companies to consider both the type and amount of fuel
    they would use to generate power when they calculated whether
    they could supply enough electricity to match expected demand.
    We agree with the plaintiffs that if the restructuring act does
    not allow electric distribution companies to finance investments
    in electric generation, it cannot be reasonably interpreted to
    permit those companies to invest in infrastructure unrelated to
    electric distribution service.   Accordingly, we reject the
    department's reasoning.   See Cardin v. Royal Ins. Co. of Am.,
    34
    
    394 Mass. 450
    , 456-557 (1985) (agency's interpretation of
    statute "hardly persuasive where [it] violates the language and
    policy of the statute," [quotation and citation omitted]).
    The department's interpretation of the statute as
    permitting electric distribution companies to shift the entire
    risk of the investment to the ratepayers is unreasonable, as it
    is precisely this type of shift that the Legislature sought to
    preclude through the restructuring act.   Contrast D.P.U. 12-77,
    at 28 (Mar. 15, 2013) ("The legislation restructured the
    electric industry in the state by providing incentives to
    investor-owned electric distribution companies to divest their
    generating assets and by adopting a competitive market structure
    for the generation and purchase of electricity.   This
    restructuring shifted the risks of generation development from
    consumers to generators, who are better positioned to manage
    those risks").
    Our interpretation of the restructuring act is supported by
    the Legislature's own actions since the law's enactment.    That
    is, where the Legislature has sought to override the risk
    allocation policy of the act, it has done so expressly.    First,
    in 2008, through enactment of the Green Communities Act, St.
    2008, c. 169, the Legislature directed electric distribution
    companies to seek proposals from renewable energy developers,
    and, if they received reasonable proposals, to enter into
    35
    ratepayer-backed long-term contracts to buy the renewable power.
    See St. 2008, c. 169, § 83.    The Legislature concluded that such
    contracts were necessary to "facilitate the financing of
    renewable energy generation facilities."    Alliance to Protect
    Nantucket Sound, Inc. v. Department of Pub. Utils. (No. 1), 
    461 Mass. 166
    , 168 (2011).    Importantly, in enacting the Green
    Communities Act, the Legislature explicitly provided the
    department with the authority to review and approve the
    ratepayer-backed renewable energy contracts.    St. 2008, c. 169,
    § 83 ("[a]ll proposed contracts shall be subject to the review
    and approval of the department of public utilities").
    The Green Communities Act represents a legislatively
    created exception to the restructuring act's general prohibition
    on electric distribution companies owning generation assets.      To
    facilitate promotion of renewable energy in the Commonwealth,
    the Legislature allowed each distribution company to construct,
    own, and operate twenty-five megawatts of solar energy before
    January 1, 2009, and 50 megawatts after January 1, 2010.
    St. 2008, c. 169, § 58.    Section 58 further provided that an
    electric distribution company had to obtain prior approval for
    cost recovery from the department in order to recover
    construction costs of a solar generation facility.    
    Id. Although the
    statute has since been amended, it continues to
    36
    provide an express, limited exemption from the restructuring
    act.    See St. 2012, c. 209, § 17.
    Second, in 2012, the Legislature enacted "An Act relative
    to competitively priced electricity," in which it authorized the
    department to order electric distribution companies in the
    Northeastern Massachusetts/Boston load zone (NEMA) to solicit
    proposals for electricity generation, and if they received
    reasonable proposals, to enter into ratepayer-backed long-term
    contracts to buy the generation for use in the NEMA load zone.
    St. 2012, c. 209, § 40.    This provision explicitly permitted the
    department to review and approve any resulting contracts if the
    department determined that they were justified.    
    Id. These actions
    by the Legislature represent a clear decision
    to depart from the policy choice to remove electric distribution
    companies from the business of generation, as expressed in the
    restructuring act, in very specific circumstances.    Here, the
    department's stated motive in issuing the order is to correct a
    perceived failure of market-based incentives to encourage
    wholesale generators to contract for adequate pipeline capacity.
    However, its means of doing so, namely by reallocating risk onto
    the ratepayers, is clearly prohibited by legislative policy.
    Thus, no matter how salutary the department may claim its policy
    aims to be, its order contravenes the fundamental policy
    embodied in the restructuring act and cannot stand.      See Utility
    37
    Air Regulatory Group v. Environmental Protection Agency, 134 S.
    Ct. 2427, 2446 (2014) (agency authority to interpret ambiguities
    in enabling statute "does not include a power to rewrite clear
    statutory terms to suit its own sense of how the statute should
    operate"); Wakefield Teachers Ass'n v. School Comm. of
    Wakefield, 
    431 Mass. 792
    , 802 (2000) (fundamental policy
    decisions are province of Legislature, and not coordinate
    branches of government).
    4.   Conclusion.   We conclude that the department erred in
    interpreting G. L. c. 164, § 94A, as amended by the 1997
    restructuring act, as authorizing it to review and approve
    ratepayer-backed, long-term contracts by electric distribution
    companies for natural gas capacity.    Accordingly, the
    department's order is vacated.
    So ordered.